Locking device.



A. VOSATKA' & L. CEJKA.

LOCKING DEVICE.

APPucAnoN FILED AUG. 17, I914.

1, 1 37,81 5. Patented May 4, 1915.

THE NORRIS PETERS C0,. PHOTG-LITHU.. WASHING TON. n C

car sTA'r LOCKING DEVICE.

Specification of Letters Patent.

Patented May 4, 1915.

Application filed August 17, 1914. Serial No. 857,040.

T all whom it may concern Be it known that we, ANTON VOSATKA and LOUIS CEJKA, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Looking Devices, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

The purpose of this invention is to provide an improved locking device in the form of a bolt applicable to sliding doors and similar closures.

It consists of the features and elements described and shown in the drawings as indicated by the claims.

In the drawings :Figure 1 is a partial elevation of a pair of sliding doors connected and secured by the locking device which is the subjectof this invention. Fig. 2 is a detail section taken as indicated at the line 22 on Fig. 1. Fig. 3 is a detail view of the socket plate. Fig. 4: is a detail View partly in section showing the locking bolt and its mounting removed from the door. Fig. 5 is a section taken as indicated at the line 55 on Fig. 1. Fig. 6 is a View similar to Fig. 4, showing the bolt rotated through a quarter turn. Fig. 7 is a detail section illustrating the application of the device to a single sliding door. Fig. 8 is a detail section similar to Fig. 2 but showing a modification of the invention.

The locking device shown in the draw ings is particularly designed for connecting and securing sliding doors or windows, such as the doors provided in the rear of a show 7 case or in some types of bookcases, which are mounted in guide ways for sliding past each other in parallel planes and whose frames in closed position of the doors slightly overlap each other so that they could be held in position by a bolt thrust through both such frames. This is the situation illustrated in Fig. l in which 1 and socket provided in the door, 2, is of a corre sponding outline being most simply made as an opening, 7", in a socket plate, 7, having the two straight sides, 7 and the two curved sides, 7, as shown in Fig. 3. A similar opening is provided in the swivel plate, 5, in which the bolt, 3, is mounted for longitudinal sliding for engaging or disengaging the socket plate, 7. Near the outer end of the bolt, 3, is provided an aperture, 3", extending transversely of the fiat faces, 3*, and designed to receive the eye loop, (i of the padlock, 6. Some distance back from the inner end the bolt, 3, is turned down and rounded at 3, to a diameter substantially equal to the distance between its flat faces, 3 so that when the bolt is thrust through the socket plate, 7, far enough with this rounded portion in the plane of said plate, 7, the bolt, 3, may be freely rotated. Just beyond the rounded portion, 3, the bolt is of substantially square cross section at 3, the square being of a size to just circumscribe the circle at 3. The remainder of the end portion is of cross section corresponding to the shape of the aperture, 7*, and may be thrust through said aperture when rotated to the proper position.

Thus it will be seen that if the bolt, 3, is thrust through the aperture, 7 until its rounded portion, 3, stands in the plane of the plate, 7, the bolt may be rotated through ninety degrees and then withdrawn sufficiently to bring its square portion, 3 into engagement with the aperture, 7 This portion being of a width substantially equal to the distance between the flat edges, 7', of the aperture, 7, cannot be rotated within the socket plate. At this position of the bolt a hole, 3", near the outer end is just outside the plane of the carrying swivel plate, 5, and when the eye loop, 6 of the padlock is inserted in the aperture, 3*, it will be impossible to slide the bolt in to bring its rounded portion, 3, into registration with the socket plate, 7. That is, with the padlock, 6, inserted, the bolt cannot be rotated or shifted to a position in which it can be rotated and it is therefore securely engaged with the socket plate, 7, so long as the padlock remains in place.

' To stop the inward movement of the bolt, 3, at the proper position for registration of its rounded portion, 3, with the socket plate, 7, the outer end of the bolt is slightly enlarged to form abutments, 3 which will engage the surface of the swivel plate, 5, at such position of the bolt. movement of the bolt is limited by a pin, 3, inserted transversely to project from the flat faces, 3*, and to engage the rear face of the swivel plate, 5, at the position in which the near end of the bolt is withdrawn completely from the socket plate, 7 This renders the operation simple and positive in spite of the fact that the working parts are practically concealed from the operator when in use.

In applying this device to a single sliding door, 10, which in closed position abuts a frame member, 11, of the cabinet, said frame member may be fitted with an angle, 12,

having an aperture, 12 similar inishape tov the aperture, 7*, of the socket plate, 7. A

further modification is illustrated in Fig. 8

in which a plate, 8, exactly similar to the socket plate, 7 is applied to the door, 1, instead of to the door, 2, while the position of the portions, 3 and 3, on the bolt, 3, are altered for registration with this plate, 8. The plate, 9, applied to the door, 2, merely as a reinforcement of its socket, 2, may then be formed simply with a round aperture large enough to accommodate the end of the bolt, 3. The bolt will thus-be controlled as to its slidabilityby the plate, 8, but will engage the plate, 9, for locking purposes. Obviously any other form of reinforcement may be substituted for the plate, 9, to serve as a socket to receive the inner end of the bolt, 3.

We claim 1. In combination, a bolt of non-circular cross section, a plate having a non-circular opening formed to receive such bolt and a mounting in which the bolt may both rotate and slide in the direction of its axis of rotation, said bolt having a portion of reduced cross section adapted to rotate in the opening'of the plate, and a non-circular portion adjacent thereto adapted to enter but not to rotate in said opening, together with means for stopping the bolt against sliding when thesaid non-circular portion is engaged in the opening. o

2. In combination, a bolt of non-circular cross section, a plate having a non-circular opening, formed to receive such bolt and a mounting in which the bolt may both rotate and slide in the direction of its axis of rota-' opening and being adapted to receive look-- ing means adjacent to its mounting to prevent sliding in the other direction.

The outward 3. In combination, a bolt of non-circular cross section, a plate having a non-circular opening formed to receive such bolt and a mounting in which the bolt may both rotate and slide in the direction of its axis of rotation, said bolt having a portion of reduced cross section adapted to rotate in the opening of the plate, and a non-circular portion i adjacent thereto adapted to enter but not to rotate in said opening, the bolt having .a

shoulder adjacent to the said non-circular portion adapted to abut the plate to prevent sliding of the bolt in one direction when.

said non-circular portion is engagedin the opening, and an aperture ad acent to ts mounting adapted to receive a locking pm or its equivalent to prevent sliding of the bolt in the other direction.

4. In combination, a bolt of non-circular cross section, a plate having a non-circular opening formed to receive such bolt and a mounting in which the bolt may both rotate and slide in the direction of its axis of rotation, said boltv having a portion of reduced.

each side of the mounting forlimiting its sliding movement therein.

5. In combination with asliding door, a

locking device comprising a bolt of non-circular cross sectlon, a mounting in whlch the bolt may both rotate and slide in the direc-1 tion of its axis of rotation carried at one side of the door, a plate independent of the door positioned on the opposite side thereof and having a non-circular opening into which the bolt is dimensioned to extend,

said bolt having a portion of reduced cross 7 section adapted to, rotate in the opening of "the plate, and a non-circular portion adjacent'tliereto adaptedto' enter but not; to rotate in said opening, together with means for stopping the bolt against sliding when the said non-circular portionis engaged in the opening. Y a

6. In combination with a sliding door, a bolt of oblong cross section mountedthereon,'th'e mounting comprising a plate secured at the outer side of the door, and a-swivel plate rotatively carried thereby having a non-circular aperture in which the bolt is slidably carried, and the locking plate independent of the door having an oblong opening positioned to. receive the inner end of the bolt, the lboltlhaving a portion near said inner end reduced in cross section and adapted to rotate in the opening of the plate, and an adjacent portion nearer said inner end of square cross section adapted to enter but not to rotate, the said opening whereby an abutment is formed on the bolt set our hands at Chicago, Illinois, this 14th for engaging the locking plate to prevent day of August, 1914.

Withdrawal of the bolt therefrom when its square portion is engaged therein, and the gg i outer end of the bolt being adapted to receive locking means for preventing its fur- Witnesses: ther insertion through the plate. I ROBT. N. BURTON,

In testimony whereof We have hereunto EDNA M. MAOINTOSH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

